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* Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
* http://paperjs.org/
*
* Copyright (c) 2011 - 2020, Jürg Lehni & Jonathan Puckey
* http://juerglehni.com/ & https://puckey.studio/
*
* Distributed under the MIT license. See LICENSE file for details.
*
* All rights reserved.
*/
// TODO: remove eslint-disable comment and deal with errors over time
/* eslint-disable */
import { ref } from '~/globals';
import { Point } from '~/basic/Point';
import { DomElement } from './DomElement';
/**
* @name DomEvent
* @namespace
* @private
*/
export const DomEvent = /** @lends DomEvent */ {
add: function (el, events) {
// Do not fail if el is not defined, that way we can keep the code that
// should not fail in web-workers to a minimum.
if (el) {
for (var type in events) {
var func = events[type],
parts = type.split(/[\s,]+/g);
for (var i = 0, l = parts.length; i < l; i++) {
var name = parts[i];
// For touchstart/touchmove events on document, we need to
// explicitly declare that the event is not passive (can be
// prevented). Otherwise chrome browser would ignore
// `event.preventDefault()` calls and omit warnings.
// See #1501 and:
// https://www.chromestatus.com/features/5093566007214080
var options =
el === globalThis.document && (name === 'touchstart' || name === 'touchmove') ? { passive: false } : false;
el.addEventListener(name, func, options);
}
}
}
},
remove: function (el, events) {
// See DomEvent.add() for an explanation of this check:
if (el) {
for (var type in events) {
var func = events[type],
parts = type.split(/[\s,]+/g);
for (var i = 0, l = parts.length; i < l; i++) el.removeEventListener(parts[i], func, false);
}
}
},
getPoint: function (event) {
var pos = event.targetTouches
? event.targetTouches.length
? event.targetTouches[0]
: event.changedTouches[0]
: event;
return new Point(
pos.pageX || pos.clientX + globalThis.document.documentElement.scrollLeft,
pos.pageY || pos.clientY + globalThis.document.documentElement.scrollTop
);
},
getTarget: function (event) {
return event.target || event.srcElement;
},
getRelatedTarget: function (event) {
return event.relatedTarget || event.toElement;
},
getOffset: function (event, target) {
// Remove target offsets from page coordinates
return DomEvent.getPoint(event).subtract(DomElement.getOffset(target || DomEvent.getTarget(event)));
},
};
// @ts-expect-error = Property 'requestAnimationFrame' does not exist on type
DomEvent.requestAnimationFrame = new (function () {
var nativeRequest = DomElement.getPrefixed(globalThis.window, 'requestAnimationFrame'),
requested = false,
callbacks = [],
timer;
function handleCallbacks() {
// Make a local references to the current callbacks array and set
// callbacks to a new empty array, so it can collect the functions for
// the new requests.
var functions = callbacks;
callbacks = [];
// Call the collected callback functions.
for (var i = 0, l = functions.length; i < l; i++) functions[i]();
// Now see if the above calls have collected new callbacks. Keep
// requesting new frames as long as we have callbacks.
// @ts-expect-error = Type 'number' is not assignable to type 'boolean'
requested = nativeRequest && callbacks.length;
if (requested) nativeRequest(handleCallbacks);
}
return function (callback) {
// Add to the list of callbacks to be called in the next animation
// frame.
callbacks.push(callback);
if (nativeRequest) {
// Handle animation natively. We only need to request the frame
// once for all collected callbacks.
if (!requested) {
nativeRequest(handleCallbacks);
requested = true;
}
} else if (!timer) {
// Install interval timer that checks all callbacks. This
// results in faster animations than repeatedly installing
// timeout timers.
timer = setInterval(handleCallbacks, 1000 / 60);
}
};
})();
ref.DomEvent = DomEvent;
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